FIG 4.

Loss of IFN-γR signaling is associated with increased lung inflammation. Lung sections were collected from Pneumocystis-infected RAG2^−/−, RAG2/IL-4Rα^−/−, and RAG2/IFN-γR^−/− mice at day 18 post-immune reconstitution and stained with hematoxylin and eosin. Representative pictures were taken at a ×100 magnification. Arrows denote peribronchial regions, and stars denote alveolar regions.